Structural transition from two-dimensional ZIF-L to three-dimensional ZIF-8 nanoparticles in aqueous room temperature synthesis with improved CO2 adsorption

Facile and Green Synthesis of Starfruit-Like ZIF-L, and Its Optimization Study

“…As shown in Figure 8 , the diffraction peaks of ZIF-L at the (110), (200), (211), (220), (310) and (222) planes were observed at 2θ values of 7.58°, 10.80°, 12.54°, 14.95°, 16.49° and 17.86°, respectively. This result had an excellent agreement with several reports from previous studies [ 14 , 20 , 28 , 34 , 39 ]. This proves that ZIF-L was successfully synthesized to have a high crystallinity.…”

“…In the fingerprint region, several transmittance peaks were observed to identify the functional groups of the ZIF-L. The peaks observed at 420.5, 756.0 and 900–1350 cm −1 are associated with the Zn-N stretching of ZIF-L, the out-of-plane bending of the Hmim ring, and the in-plane bending of the Hmim ring, respectively [ 2 , 29 , 34 , 38 , 40 ].…”

“…Both ZIF-8 and ZIF-L have been well synthesized in aqueous systems, which are more environmentally friendly. ZIF-L needs a lower molar ratio of ligand to metal compared to ZIF-8, such that the synthesis of ZIF-L is more economical [ 34 ]. In the synthesis of ZIF-L, the molar ratio of ligand to metal plays an important role to produce ZIF-L with excellent characteristics [ 33 , 34 ].…”

“…ZIF-L needs a lower molar ratio of ligand to metal compared to ZIF-8, such that the synthesis of ZIF-L is more economical [ 34 ]. In the synthesis of ZIF-L, the molar ratio of ligand to metal plays an important role to produce ZIF-L with excellent characteristics [ 33 , 34 ]. In this study, two other parameters were also involved besides the molar ratio of ligand to metal in order to further optimize the synthesis of ZIF-L, namely the reaction time and temperatures.…”

Rhodamine B degradation by nanosized zeolitic imidazolate framework-8 (ZIF-8)

“…This indicates ZIF-8 is a better adsorbent for RhB with light. In all three cases, the initial pH remained the same at ∼8.0, the slightly basic pH was a result of the basicity of ZIF-8, 8 , 41 which is favorable for adsorbing cationic dyes like RhB. The concentration of RhB in solution decreased significantly within the first 10 minutes, indicating fast RhB adsorption by ZIF-8 nanocrystals even in dark.…”